The 3CX1200A7, the 3CX1200D7 and the 3CX1200Z7 have similar ratings. I would like to build a two tube 160-10 linear around one of these types. Which one seems to be the best and why? Thanks, Ken Barber W2DTC -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com